AQA GCSE Combined Trilogy Chemistry 8464 - Paper 2 - 12th June 2019

what did everyone put for the water test? I put test the pH but i'm wrong I think

oh ok thats should be right, would mine be right?

I put that, I said use the universal indicator and it should turn green to indicate the pH is 7 (Neutral), so it's water.

What did you say for why ethanol is sustainable

what did everyone put for the water test? I put test the pH but i'm wrong I think

I said it was a renewable resource

for dissolved solids, i put down to evaporate water leaving solids at the bottom of the flask which should turn into crystals. this should be dried and weighed

I said that then I crossed it out

I put filtration

what did everyone put for the water test? I put test the pH but i'm wrong I think

Did anyone get 8.8%

Did anyone get 8.8%

0.031 for the first 4 marker
8.8 percent for the percentage
0.002 or smth like that for the moles
15 for the mass

what did people do for the wavelength question i spoke about the greenhouse gases interfering with sun rays which are transmitted through gamma radiation

0.031 for the first 4 marker
8.8 percent for the percentage
0.002 or smth like that for the moles
15 for the mass

I put that the greenhouse gases don't absorb the incoming short wavelength radiation from the sun. They absorb long wavelength radiation from the sun and re-radiate it in all directions including back to Earth. The longwave radiation is a thermal radiation and so it makes Earth hotter.